Abstract:

Stimulated methyl orange wastewater has been treated by micro-electrolysis as the main process,and scrap iron and fly ash as micro-electrolysis packings,so as to obtain a new route for the utilization of fly ash,and to discuss the new methods for improving the treatment effectiveness of micro-electrolysis by using rare earth Gd catalysis. The results show that fly ash can replace activated carbon in micro-electrolysis reaction and has good treatment effectiveness. Rare earth Gd can significantly speed up the reaction rate and improve the decolorization rate and degradation rate of methyl orange. The optimal operation parameters are as follows:influent pH is 3.5,reaction time 60 min,rare earth Gd added in form of Gd³⁺ solution(3.08 g/L) with a dosage of 10 mL,scrap iron and fly ash dosage 150 g/L,and m(fly ash):m(scrap iron)=2:1.

Key words: methyl orange, simulated dyeing wastewater, micro-electrolysis, rare earth Gd

摘要：

以甲基橙模拟染料废水为处理对象，微电解法为主体工艺，采用铁屑和粉煤灰作为微电解填料，以获得粉煤灰资源化利用的新途径，并探讨稀土Gd催化提高微电解处理效果的新方法。结果表明，粉煤灰可以替代活性炭参与微电解反应，并有良好的处理效果，稀土Gd能明显加快反应速率并提高甲基橙的脱色率和降解率。试验最佳运行参数：进水pH为3.5，反应时间60 min，稀土Gd以Gd³⁺溶液（3.08 g/L）形式投加，投加量为10 mL，铁粉煤灰投加量为150 g/L，m（粉煤灰）：m（铁屑）为2：1。

关键词: 甲基橙, 模拟染料废水, 微电解, 稀土Gd

CLC Number: 

• X703